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  <head>
    <title>Upgrading</title>
  </head>

  <body>
    <h1>Upgrading</h1>

    <h2>Upgrading between versions of Twisted Core</h2>

    <p>
    These documents describe code changes you may need to make to use a
    newer version of Twisted Core. Not all releases will require code
    changes.
    </p>

    <ul>
      <li><a href="2.0/index.xhtml">Twisted 2.0</a></li>
    </ul>
  </body>
</html>
